Thread cutter and shuttle therefor



Feb. 28, 1933. O V PAYNE 1,899,634

THREAD CUTTER A ND SHUTTLE THEREFOR Original Filed Feb. 21, 1931 fv I/ENT01? 0504/? l/. P4 )(NE Patented Feb. 28, 1933 UNITED STATES PATENTOFFICE OSCAR V. PAYNE, OF WOBCESTER,. MASSACHUSETTS, ASSIGNOR TOCROMITON KNOWLES LOOM WORKS, 0F WORCESTER, MASSACHUSETTS,

MASSACHUSETTS A conro mrron or THREAD ou'rrnn; AND SHUTTLE THEREFORApplication filed February 21, 1931, Serial No. 517,561. ltenjewed August w, 1932.

This invention relates to improvements in means for cutting the threadwhich extends from the shuttle back to the adjacent selvage on atransferringpick of an automatic loom and it is the general object ofthe invention to provide a simple and efficient device of this kindconstructed to act on the weft at a plurality of points. 1

In weft replenishing looms there is usually a weft end extending fromthe selvage through the shuttle eye to the outgoing bobbin ontransferringpicks of the loom, and unless this thread is withdrawn itislikely to be whipped into the shed on a subsequent pick of the shuttle.It is an-important object of my present invention to provide means forparting this weft end adjacent the shuttle eye preferably by a forcederived in part at least from the forward movement of the lay andefiective tooffer more than one opportunity for the severance of thethread. s

It is a further object of my invention to provide a shuttle having anotched plate to coact with a wedge shaped cutter in such a way that atleast two different cuttingsurfaces or edges are brought into play forthe purpose of increasing the likelihood that the weft will be parted. f

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the, combination andarrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawing, wherein a convenient embodiment of myinvention is set forth,

Fig. lshows a front elevation of the thread parting mechanism formingthe subject matter of my present invention, V

Fig. 2 is a vertical section on line 2-2 of Fig. 1 showing the parts ofthecutting mechanism in the relation they assume just prior to thecutting,

Fig. 3 is an enlarged view similar to a por-' tion of Fig. 2 but showingthe engagement of the wedge-shaped cutter with two spaced cutting edgeson the shuttle, and

Fig. 4 is a detailed vertical section on line H of Fig. 2.

Referring to the drawing, I have shown a shuttle S having a sidedelivery eye 10 from which the weft W extends A longitudinal groove 11in substantial horizontal alignment with the delivery eye extends along,the front wall 12 .Of'the shuttle and serves the usual function ofproviding a passage for the weft leading from the-delivery eye as theshuttleenters the shuttle box not shown. a

A pivoted lever 13 is mounted preferably on stationarystructure'indicated at 14 and is controlled so as normally to have itsright hand end as viewed inFig. 2 forwardly of the extreme forwardposition of the shuttle, but moved rearwardly at the time of trans: ferto a-p'osition where it may have contact with a severing'or weft partingsurface carried by the shuttleand described hereinafter. The manner ofcontrolling this lover of itself forms nopart of the present inventionand it is suflicient for present purposes to the shuttle may comprise aplate 20 secured in a recess 21 located in the front shuttle wall 12; Asset forth in 3 this plate may be pro-' vided with a series of verticalcorrugations or teeth presenting spaced partingedges 23. The othermember comprises a head 30 which may have the forward end thereofslotted as at 31 to receive the bearing element 32 carried by andpreferably formed as part of the lever 13. As shown .in Fig. 3, thebearing element is not quite as wide as the slot 31 nor does it extendto therear surface of said slot. As shown in Fig. 4 the element isprovided with a bore 33 which is somewhat larger than a supporting pin34L extending across the slot 31 and secured to the head. 7 The purposeof this construction is to permit the head to have a certain limiteduniversal 100 I movement with respect to the lever in both horizontaland vertical directions.

' The head is provided with two inclined rearwardly facing surfaces 35substantially vertical which are disposed atan angle to each other whichgreaterthan the angle of the surfaces of the plate 20 defining the edges23.

When operating on a transferring pick of the loom with the lever movedrearwardly, as" previously described, the shuttle will advance with theweft W extending from the eye 10 across the plate and into the groove11. The teeth may be slightly behind the path normally traversed by theweft so as to avoid abrasion and the plate extends both above and belowthe weft as do also the inclined surfaces of the head. As theshuttleadvances the last named surfaces will engage one or another ofthe points 23, and because of the ability of thehead to move in auniversal direction throughout a limited range of action relatively tothe lever, said surfaces will adjust themselves so as to engagetwo'adjacent cutting edgesf23. As the lay L moves the shuttle forwardlya spring 22will yield to permit rearward motion of the lever and head.Then the lay is in its extreme forward position the parts assume therelationshown in Fig. 3, from which it will be seen that the weft W ispinched between both the surfaces 35 and certain of the cutting edges23, thus givingdouble assurance that the weft will be parted. 7

From the foregoing it will be seen that I have provided a simple threadcutting 'mecha-' nism carried in .part by the shuttle and comprisingtwoelements so disposed and formed as to present a pair of cutting edges tothe weft at the time of transfer. This result is achieved by having thehead 30 1nounted so that it may move sufficiently to engage two of theedges 23 despite slight angular or longitudinal displacement of theshuttle relatively to the lever 13. While I have shown the wedge membermounted on the lever and the anvil corrugated member von the shuttle,yet these parts can be interchanged without departing from the spirit ofthis invention.

Havingthus described my invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spiritand scope of the invention and I do not wish tobe limited to the details herein disclosed, but what I claim is: v

1. In thread parting mechanism for looms, a shuttle movable forwardly inthe loom v a weft parting member on the shuttle, a second parting membermounted independently of the shuttle one of th members having spacedcutting edges, and the other member having a pair of inclined surfaceseach disposedto engage one of the edges.

2. In thread cutting mechanism for a weft said edges and part said weft.

replenishing loom, a shuttle, and a pair of coacting thread severingmembers each having wedge shaped portions and one of which is carried bythe shuttle.

3. In thread parting mechanism for a weft replenishing loom, a shuttlemovable forwardly in the loom, and a pair of coacting thread partingmembers one of which is carspaced vertical cutting edges carried by theshuttle, and a wedge mounted independently of the shuttle to coact withthe edges as the shuttle advances to sever the weft.

5. In thread partin'g mechanism for a weft replenishing loom, a shuttlemovable forwardly in the loom, a pair of weft parting members one ofwhich is mounted on the shuttle and the other of which is mountedindependently of the shuttle, oneof said members having. a pluralityofhorizontally spaced substantially vertical cutting edges,

the other member having a surface to engage at least two of the cuttingedges as the shuttle moves forwardly to force the weft against 6. Inthread parting mechanism for a weft replenishing loom, a shuttle movableforwardly in the-loom, a pair o f'weft parting members one of which iscarried by the front wall of the shuttle and the other of which ismounted to be approached by the first mem- 1105 her as the shuttleadvances. one of said members having a plurality of vertical partingedges and the other member having provision by virtue of which the weftis forced against two of the edges to part said .weft.

'7. In thread parting mechanism fora weft replenishing loom, a shuttlemovable forwardly in the loom, the weft extending along the shuttle, and a pair of coacting members one of which is mounted on the front wallof the shuttle and the other of which is positioned to be approached bythe first named member as the shuttle advances.

one of said members having a plurality of parting edges transverse ofthe weft,. the other of said members having provision by virtue of ofwhich the weftis forced against two of the parting edges. I

8. In thread parting mechanism for a weft replenishing loom, a shuttlemovable f forwardly in the loom, and two coacting thread parting membersone of which is mounted on the shuttle, said members brought into threadparting relation by ad-" vance movement of the shuttle, said membershaving provision for acting on the weft at two spaced points.

9. In thread parting mechanism for a Weft replenishing loom, a shuttlemovable forwardly in the loom, and a pair of coasting thread partingmembers one of which is carried on the forward face of the shuttle, oneof said members having a plurality of spaced cutting edges and the otherhaving a wedge portion, forward movement of the shuttle effective tomove the'wedge portion. between two of the cutting edges to part theweft, one of said members mounted to move angularly in a plane parallelto the length of the shuttle.

10. In thread parting mechanism for a weft replenishing loom, a shuttlemovable forwardly in the loom, a pair ofweft parting members one ofwhich is carried by the front wall of the shuttle and the other of whichis mounted to be approachedby the first member as the shuttle advances,one of said members having a plurality of vertical parting edges and theother member having pro-v vision by virtue of which the weft is forcedagainst two of the edges to part said weft, one of said members mountedto move angularly in a plane parallel to the length of the shuttle. V

11. In thread parting mechanism for a weft replenishing loom, a shuttlemovable forwardly in the loom, a pair of weft parting members one ofwhich is carried by the front wall of the shuttle and the other of whichis mounted to be approached by the first member as the shuttle advances,one of said members having a plurality of vertical parting edges and theother member having provision by virtue of which the weft is forcedagainst two of the edges to part said weft, one of said members mountedto move angularly in planes parallel to and transverse of the length ofthe shuttle.

In testimony whereof I have hereunto affixed my signature.

OSGAB V. PAYNE.

